Transmission chain structure and wind generating set

Abstract

The utility model provides a transmission chain structure and a wind generating set, and relates to the technical field of wind power hydraulic variable pitch. The transmission chain structure comprises a hub provided with a first containing cavity; the mounting support is connected with a chassis of the cabin; and the force transmission cylinder is rotationally arranged in the mounting support, the force transmission cylinder is connected with the hub, the force transmission cylinder and the hub synchronously rotate, and the force transmission cylinder is provided with a second containing cavity. Parts of the hydraulic variable-pitch system are integrated in the force transmission cylinder and the hub, the force transmission cylinder and the hub rotate synchronously, and a high-pressure oil-electric slip ring connecting the rotating hub and a static cabin is not needed to transmit hydraulic power, so that a leakage path caused by abrasion of a sealing surface of the high-pressure oil-electric slip ring is eliminated by canceling the high-pressure oil-electric slip ring. And meanwhile, part of components of the hydraulic variable pitch system are arranged in the force transmission cylinder, so that the occupied space of the hub is reduced, and the operation and maintenance space of the hub is expanded.

Description

Technical Field

[0001] This application relates to the field of wind power hydraulic pitch technology, and in particular to a transmission chain structure and a wind turbine generator set. Background Technology

[0002] The drivetrain structure of a wind turbine generator set includes a hub, a main shaft, and a power generation system. The hub is connected to the power generation system (such as a gearbox or generator) via the main shaft. Both the main shaft and the power generation system are located within the nacelle. The hub is used to mount the blades. Wind power drives the blades to rotate, which in turn drives the hub to rotate. This rotation is transmitted through the main shaft to the power generation system, thus converting mechanical energy into electrical energy. The hydraulic pitch system is a control system in the wind turbine generator set that uses hydraulic drive to adjust the angle between the blades and the wind direction. For example, the actuators of the hydraulic pitch system (such as cylinders, high-voltage accumulators, and valve groups) are built into the hub, directly driving the blades to rotate around their axis and adjusting the angle between the blades and the wind direction. The power source of the hydraulic pitch system (hydraulic station and high-pressure hydraulic slip rings) is usually located in the nacelle, using the high-pressure hydraulic slip rings to transmit hydraulic oil power to drive the actuators within the hub.

[0003] In the existing technology, the hydraulic pitch system is distributed, and the high-pressure hydraulic slip rings suffer from sealing wear due to long-term rotational friction, resulting in leakage problems. However, with the increase in wind power generation capacity, the hub size has increased, and the hydraulic pitch system has been changed to a centralized layout, that is, all the components of the hydraulic pitch system are concentrated in the hub, eliminating the need for high-pressure hydraulic slip rings.

[0004] However, centralized deployment occupies a huge space in the wheel hub, reducing the space available for wheel hub maintenance and making wheel hub maintenance inconvenient. Utility Model Content

[0005] This application provides a transmission chain structure and a wind turbine generator set to solve the problem that centralized deployment will occupy a huge space in the hub, reducing the hub maintenance space and making hub maintenance inconvenient.

[0006] To achieve the above objectives, the technical solution of this application is as follows:

[0007] On one hand, this application provides a transmission chain structure, including: a hub with a first receiving cavity inside; a mounting bracket for connecting to the underframe of the engine room; and a force transmission cylinder rotatably disposed within the mounting bracket, the force transmission cylinder for connecting to and rotating synchronously with the hub, the force transmission cylinder having a second receiving cavity inside, the first receiving cavity and the second receiving cavity communicating, the second receiving cavity for installing at least one of the following in a hydraulic pitch system: an accumulator, an oil tank, a pump assembly, a pitch valve assembly, and a distribution valve assembly, and the first receiving cavity for installing the hydraulic cylinder of the hydraulic pitch system.

[0008] In one possible implementation, the transmission chain structure in this application embodiment further includes a first rotating member, which is spaced on the force transmission cylinder. One end of the force transmission cylinder is connected to the hub through the first rotating member, and the first rotating member is rotatably mounted on the mounting support.

[0009] In one possible implementation, the transmission chain structure in this application embodiment includes a first rotating component comprising a first bearing and a second bearing. The inner rings of the first bearing and the second bearing are sequentially sleeved on the force transmission cylinder. The outer rings of the first bearing and the second bearing are fixedly connected to the mounting support. The inner rings of the first bearing and the second bearing rotate relative to the mounting support around the axis of the hub.

[0010] In one possible implementation, the transmission chain structure in this application embodiment has the balls of the first bearing arranged longitudinally and the balls of the second bearing arranged laterally.

[0011] In one possible implementation, the transmission chain structure in this application embodiment further includes a first planetary gear train and a second rotating member. The first planetary gear train includes a planet carrier, a fixed shaft, planet gears, and a sun gear. The fixed shaft is disposed on the planet carrier, and the planet gears are rotatably disposed on the fixed shaft, with the planet gears meshing with the sun gear. The second rotating member is connected to the end of the force transmission cylinder away from the hub, and the second rotating member meshes with the planet gears, with the second rotating member rotatably disposed on the mounting support.

[0012] In one possible implementation, the transmission chain structure in this application embodiment includes a second rotating component comprising a third bearing and a gear ring. The third bearing has an inner ring and an outer ring. The inner ring of the third bearing is connected to the gear ring, and the gear ring meshes with a planetary gear. The outer ring of the third bearing is fixedly connected to a mounting support, and the inner ring of the third bearing rotates relative to the mounting support about the axis of the hub.

[0013] In one possible implementation, the transmission chain structure in this application embodiment has a third bearing that is a double-row cylindrical roller bearing and a first planetary gear train that is a double-linked planetary gear train.

[0014] In one possible implementation, the transmission chain structure in this embodiment of the application further includes a support member, one end of which is connected to the mounting bracket, and the other end is used to connect to the base frame.

[0015] In one possible implementation, the transmission chain structure in this application embodiment includes at least one mounting base, and the support member includes a first support rod and a second support rod. The first support rod is connected to the mounting base, and one end of the second support rod is connected to the first support rod, while the other end is connected to the base frame.

[0016] On the other hand, this application also provides a wind turbine generator set, including a body and a transmission chain structure as described in any of the above embodiments disposed on the body.

[0017] This application provides a drivetrain structure and a wind turbine generator set. The drivetrain structure includes a hub with a first receiving cavity inside; a mounting bracket for connecting to the nacelle's underframe; and a force transmission cylinder rotatably disposed within the mounting bracket, for connecting to and rotating synchronously with the hub. The force transmission cylinder has a second receiving cavity inside, and the first and second receiving cavities are connected. The second receiving cavity is used to install at least one of the following components of a hydraulic pitch system: an accumulator, an oil tank, a pump assembly, a pitch valve assembly, and a distribution valve assembly. The first receiving cavity is used to install the hydraulic cylinder of the hydraulic pitch system. By integrating the components of the hydraulic pitch system into the force transmission cylinder and hub, and because the force transmission cylinder and hub rotate synchronously, the power source of the hydraulic pitch system (such as accumulators, oil tanks, pump sets, pitch valve assemblies, and distribution valve assemblies) and the actuators (such as hydraulic cylinders) are all located within the synchronously rotating force transmission cylinder and hub. This eliminates the need for a high-pressure hydraulic slip ring connecting the rotating hub to the stationary nacelle to transmit hydraulic power, thus eliminating the leakage path caused by wear on the rotating interface sealing surface of the high-pressure hydraulic slip ring. Simultaneously, housing some components of the hydraulic pitch system within the force transmission cylinder reduces the space occupied by the hub, thereby expanding the hub's maintenance space and facilitating operation and maintenance by operators. Attached Figure Description

[0018] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0019] Figure 1 A simplified schematic diagram of the transmission chain structure provided in the embodiments of this application;

[0020] Figure 2 A schematic diagram of the transmission chain structure provided in the embodiments of this application. Figure 1 ;

[0021] Figure 3 A schematic diagram of the transmission chain structure provided in the embodiments of this application. Figure 2 ;

[0022] Figure 4 This is a schematic diagram of the structure of a wheel hub provided in an embodiment of this application;

[0023] Figure 5 A simplified schematic diagram illustrating the connection between the mounting base and the support member provided in the embodiments of this application;

[0024] Figure 6 This is a schematic diagram of the structure of the first planetary gear train provided in an embodiment of this application.

[0025] Explanation of reference numerals in the attached figures:

[0026] 100-Wheel Hub;

[0027] 200 - Mounting support; 210 - Mounting base;

[0028] 300-Power Transmission Cylinder;

[0029] 400 - First rotating component; 410 - First bearing; 420 - Second bearing;

[0030] 500 - First planetary gear train; 510 - Planet carrier; 520 - Fixed shaft; 530 - Planet gears; 540 - Sun gear;

[0031] 600 - Second rotating component; 610 - Third bearing; 620 - Gear ring;

[0032] 700 - Support component; 710 - First support rod; 720 - Second support rod.

[0033] The accompanying drawings illustrate specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to particular embodiments. Detailed Implementation

[0034] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.

[0035] It should be noted that in the description of the embodiments of this application, the terms "upper", "lower", "inner", "outer" and other terms indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of description, and are not intended to indicate or imply that the device or component must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the embodiments of this application.

[0036] Furthermore, it should be noted that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0037] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "fixation," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0038] The drivetrain structure of a wind turbine generator includes a hub, a main shaft, and a power generation system. The hub is connected to the power generation system, such as a gearbox or generator, via the main shaft. Both the main shaft and the power generation system are located within the nacelle. The hub is used to mount the blades. Wind power drives the blades to rotate, which in turn drives the hub to rotate. This rotation is transmitted through the main shaft to the power generation system, thus converting mechanical energy into electrical energy. The hydraulic pitch system is a control system in a wind turbine generator that uses hydraulic drive to adjust the angle between the blades and the wind direction. For example, the actuators of the hydraulic pitch system, such as cylinders, high-voltage accumulators, and valve groups, are built into the hub, directly driving the blades to rotate around their axis and adjusting the angle between the blades and the wind direction. The power source of the hydraulic pitch system, the hydraulic station and the high-pressure hydraulic slip rings, are usually located in the nacelle. The power source, which transmits hydraulic oil through the high-pressure hydraulic slip rings, drives the actuators within the hub.

[0039] It should be noted that the high-pressure hydraulic slip ring is a pipe connecting the rotating and stationary parts. Components of the hydraulic pitch system are partially installed in the rotating hub and partially in the stationary engine room, connected by a rotating pipe and a high-pressure hydraulic slip ring. Over time, the rotating pipe joints are prone to wear and oil leakage due to rotational friction.

[0040] In existing technologies, the distributed deployment of hydraulic pitch systems leads to leakage problems due to the wear and tear of high-pressure hydraulic slip rings caused by long-term rotational friction. However, with the increase in wind power generation capacity, the hub size has increased, necessitating a centralized deployment of the hydraulic pitch system. This involves housing all components of the hydraulic pitch system within the hub, eliminating the need for high-pressure hydraulic slip rings. However, centralized deployment occupies a significant amount of space within the hub, reducing maintenance space and making hub maintenance inconvenient.

[0041] In view of this, this application provides a drivetrain structure and a wind turbine generator set. The drivetrain structure includes a hub with a first receiving cavity inside the hub; a mounting bracket for connecting to the underframe of the nacelle; and a force transmission cylinder rotatably disposed within the mounting bracket for connecting to and rotating synchronously with the hub. The force transmission cylinder has a second receiving cavity inside, and the first and second receiving cavities are connected. The second receiving cavity is used to install at least one of the following components of a hydraulic pitch system: an accumulator, an oil tank, a pump assembly, a pitch valve assembly, and a distribution valve assembly. The first receiving cavity is used to install the hydraulic cylinder of the hydraulic pitch system. By integrating the components of the hydraulic pitch system into the force transmission cylinder and hub, and because the force transmission cylinder rotates synchronously with the hub, the power source of the hydraulic pitch system (such as the accumulator, oil tank, pump set, pitch valve group, and distribution valve group) and the actuator (such as the hydraulic cylinder) are located within the rotating force transmission cylinder and hub. This eliminates the need for a high-pressure hydraulic slip ring connecting the rotating hub to the stationary nacelle to transmit hydraulic power, thus eliminating the leakage path caused by wear on the rotating interface sealing surface of the high-pressure hydraulic slip ring. Simultaneously, housing some components of the hydraulic pitch system within the force transmission cylinder reduces the space occupied by the hub, thereby expanding the hub's maintenance space and facilitating operation and maintenance by operators.

[0042] The following is combined Figures 1 to 6 The present application will be described in detail with reference to specific embodiments.

[0043] On one hand, this application provides a transmission chain structure, including: a hub 100 having a first receiving cavity inside the hub; a mounting bracket 200 for connecting to the underframe of the nacelle; and a force transmission cylinder 300 rotatably disposed within the mounting bracket 200, the force transmission cylinder 300 for connecting to and rotating synchronously with the hub 100, the force transmission cylinder 300 having a second receiving cavity inside the force transmission cylinder 300, the first receiving cavity and the second receiving cavity communicating, the second receiving cavity for installing at least one of the following in the hydraulic pitch system: an accumulator, an oil tank, a pump assembly, a pitch valve assembly, and a distribution valve assembly, and the first receiving cavity for installing the hydraulic cylinder of the hydraulic pitch system.

[0044] The force transmission cylinder 300 has a hollow cylindrical structure to form an internal receiving cavity 310. The depth of the receiving cavity 310 can be designed according to actual conditions. In addition, a maintenance port can be provided on the force transmission cylinder 300 to facilitate the inspection and maintenance of the components of the hydraulic pitch system inside the force transmission cylinder 300. Since the first and second receiving cavities are connected, operators or maintenance personnel can also enter the inside of the force transmission cylinder 300 from the hub 100 to inspect and maintain the components of the hydraulic pitch system.

[0045] The mounting bracket 200 is used to mount the device on the base frame. Three bearings are mounted on the mounting bracket and connected to the force transmission cylinder 300, enabling synchronous rotation of the force transmission cylinder 300 and the hub 100. Each bearing has an inner ring and an outer ring. The inner ring of the bearing is fitted onto the force transmission cylinder 300. For ease of description, the three bearings are named bearing 410 (first bearing), 420 (second bearing), and 610 (third bearing). Bearing 410 and bearing 420 are sequentially positioned at the end of the force transmission cylinder 300 facing the hub 100. The inner ring of bearing 410 is fitted onto the force transmission cylinder 300 and is connected to the hub 100 via a flange, or directly to the hub 100, allowing the force transmission cylinder 300 to rotate synchronously with the hub 100. The outer rings of bearings 410 and 420 are both rigidly connected to the mounting bracket 200, and neither the outer rings of bearings 410 nor the mounting bracket 200 rotate. The outer ring of the third bearing 610 is fixedly connected to the mounting bracket 200, and the inner ring of the third bearing 610 is connected to the gear ring 620. The gear ring 620 rotates at the same speed as the inner ring of the third bearing 610, and the gear ring 620 is connected to the end of the force transmission cylinder 300 away from the hub 100. The third bearing 610 can be a cylindrical roller bearing. The third bearing 610 can be a double bearing.

[0046] It is understood that in this application, the force transmission cylinder 300 rotates synchronously with the hub 100. The components of the hydraulic pitch system are integrated within the force transmission cylinder and the hub. The hydraulic system's power source pump unit and the actuator cylinder are both located within the rotating force transmission cylinder 300 and the hub 100. This eliminates the need for a high-pressure hydraulic slip ring connecting the rotating hub 100 to the stationary nacelle to transmit hydraulic power. By eliminating the high-pressure hydraulic slip ring, the leakage path caused by wear on the sealing surface of the rotating interface of the high-pressure hydraulic slip ring is eliminated. Simultaneously, the placement of some hydraulic pitch system components within the hub 100 reduces the space occupied by the hub 100, thereby expanding the maintenance space of the hub 100 and facilitating operation and maintenance by operators.

[0047] This application also includes a first rotating member 400, which is spaced and sleeved on the force transmission cylinder 300. One end of the force transmission cylinder 300 is connected to the hub 100 through the first rotating member 400, and the first rotating member 400 is rotatably mounted on the mounting support 200.

[0048] In this application, the first rotating component 400 achieves a rigid rotational connection between the hub 100 and the force transmission cylinder 300. The first rotating component 400 provides rotational freedom for the force transmission cylinder 300, allowing the force transmission cylinder 300 to rotate with the hub 100. A hydraulic pitch system is integrated inside the hub 100 and the force transmission cylinder 300, thereby eliminating the need for a high-pressure hydraulic slip ring.

[0049] The first rotating component 400 includes a first bearing 410 and a second bearing 420. The inner rings of the first bearing 410 and the second bearing 420 are sequentially sleeved on the force transmission cylinder 300. The outer rings of the first bearing 410 and the second bearing 420 are fixedly connected to the mounting support 200. The inner rings of the first bearing 410 and the second bearing 420 rotate relative to the mounting support 200 around the axis of the hub 100.

[0050] The balls of the first bearing 410 are arranged longitudinally, such as in an angular contact ball bearing, and are used to bear axial loads. The balls of the second bearing 420 are arranged laterally, such as in a deep groove ball bearing or a cylindrical roller bearing, and are used to bear radial loads. The inner rings of both the first bearing 410 and the second bearing 420 are fitted onto the outer wall of the force transmission cylinder 300 and rotate with the force transmission cylinder 300. The outer rings of the first bearing 410 and the second bearing 420 are fixed to the mounting support 200, forming a rotational support interface. This application facilitates the optimization of the axial and radial stiffness of the force transmission cylinder 300 through the combination of different bearing types.

[0051] This application also includes a first planetary gear train 500 and a second rotating member 600. The first planetary gear train 500 includes a planet carrier 510, a fixed shaft 520, planet gears 530 and a sun gear 540. The fixed shaft 520 is disposed on the planet carrier 510, and the planet gears 530 are rotatably disposed on the fixed shaft 520 and mesh with the sun gear 540. The second rotating member 600 is connected to the end of the force transmission cylinder 300 away from the hub 100, and the second rotating member 600 meshes with the planet gears 530 and is rotatably disposed on the mounting support 200.

[0052] The planetary carrier 510 is connected to the mounting bracket 200. The planetary carrier 510 has a fixed shaft 520. The planetary gears 530 are sleeved on the fixed shaft 520. The sun gear 540 meshes with the planetary gears 530. The planetary gears 530 mesh with the gear ring 620. The force transmission cylinder 300 is connected to the gear ring 620. The rotation of the force transmission cylinder 300 drives the gear ring 620 to rotate. The gear ring 620 drives the planetary gears 530 to rotate. The planetary gears 530 drive the sun gear 540 to transmit power.

[0053] The second rotating component 600 includes a third bearing 610 and a gear ring 620. The third bearing 610 has an inner ring and an outer ring. The inner ring of the third bearing 610 is connected to the gear ring 620, and the gear ring 620 meshes with the planetary gear 530. The outer ring of the third bearing 610 is fixedly connected to the mounting support 200. The inner ring of the third bearing 610 rotates relative to the mounting support 200 around the axis of the hub 100.

[0054] It should be noted that the power transmission cylinder 300 and the gear ring 620 are physically connected, such as by flange fixing or bolt fixing, to form an integrated rotating structure with no relative motion. The two are rigidly connected to achieve synchronous rotation, thereby transmitting power to the planetary gear train 500.

[0055] Understandably, when the gear ring 620 is the input and the sun gear 540 is the output, the power transmission cylinder 300 is relatively large. The transmission between the two is achieved by connecting the large gear ring 620 and the power transmission cylinder 300. The transmission process is as follows: wind power drives the blades to rotate, causing the hub 100 to rotate, which in turn drives the power transmission cylinder 300 to rotate. The power transmission cylinder 300 then drives the gear ring 620 to rotate synchronously. When the gear ring 620 rotates, the planetary gear 530, which meshes with it and is mounted on the fixed planetary carrier 510, begins to rotate, simultaneously driving the sun gear 540 to output power. The inner ring of the third bearing 610 rotates with the gear ring 620, while the outer ring remains stationary, forming a rotational support interface to ensure the stability of the gear ring 620's rotation and prevent radial offset.

[0056] In one possible implementation, the transmission chain structure in this embodiment of the application features a third bearing 610 that is a double-row cylindrical roller bearing, and a first planetary gear train 500 that is a double-linked planetary gear train. The double-row cylindrical roller bearing further bears radial loads, supports the rotating gear ring 620, and reduces vibration and off-center loading.

[0057] Because the power transmission cylinder 300 is relatively large, the first-stage planetary gear train 500 can adopt a fixed-axis gear train structure with ring gear input, sun gear output, and fixed planet carrier. It should be noted that the fixed shaft 520 of the first-stage planetary gear train 500 can not only avoid the problem of floating uneven load, but can also be set as a double-linked planetary gear to increase the transmission ratio within a limited space.

[0058] It is understandable that when the first planetary gear train 500 is a double-linked planetary gear train, each planetary gear 530 has two gears with different numbers of teeth. The two gears are coaxially arranged and rotatably mounted on the fixed shaft 520 of the planet carrier 510 to rotate synchronously. For ease of description, the two gears are named the first gear and the second gear. The first gear meshes with the ring gear 620, and the second gear meshes with the sun gear 540.

[0059] The transmission process is as follows: the gear ring 620 rotates, thereby driving the first gear on the planetary gear 530 to rotate. Since the first gear and the second gear rotate synchronously, the second gear rotates synchronously. The second gear drives the sun gear 540 to output power, thereby adjusting the transmission ratio and realizing the effect of multi-stage transmission in a single-stage planetary gear train 500. This saves axial space and is suitable for use in limited spaces. In addition, it can reduce the number of gearbox stages, reduce material usage and manufacturing costs, and reduce the overall weight.

[0060] This application does not limit the method of achieving synchronous rotation of two gears. For example, synchronous rotation can be achieved between two gears through interference fit or keyway connection.

[0061] To enhance the stability of the mounting bracket 200, this application also includes a support member 700, one end of which is connected to the mounting bracket 200 and the other end is used to connect to the base frame.

[0062] Mounting base 210 is a bearing housing, used to support rotating components. Both the first rotating component 400 and the second rotating component 600 are bearings, allowing the force transmission cylinder 300 to rotate within them. The bearing housing supports the force transmission cylinder 300, ensuring its radial or axial positioning during rotation, while also distributing the load.

[0063] In some embodiments, the mounting bracket 200 includes at least one mounting base 210, and the support member 700 includes a first support rod 710 and a second support rod 720. The first support rod 710 is connected to the mounting base 210, and one end of the second support rod 720 is connected to the first support rod 710, and the other end is connected to the base frame.

[0064] It should be noted that this application does not limit the number of mounting seats 210. For example, there can be two mounting seats 210. The two mounting seats 210 are spaced apart to improve the stability of the force transmission cylinder 300 and avoid deformation caused by excessive force on a single point. Moreover, the spaced arrangement of multiple bearing seats can better cope with axial and radial forces, reduce shaft deflection, and ensure transmission efficiency. The two mounting seats 210 are respectively arranged correspondingly to the first rotating member 400 and the second rotating member 600. For example, the outer ring of the first rotating member 400 is set inside the mounting seat 210, that is, the mounting seat 210 is sleeved on the outer ring of the first rotating member 400, and the outer ring of the second rotating member 600 is also set inside the mounting seat 210, that is, the mounting seat 210 is sleeved on the outer ring of the second rotating member 600. The number of mounting bases 210 can also be one. The two ends of the mounting base 210 are connected to the first rotating member 400 and the second rotating member 600 respectively. Specifically, one end of the mounting base 210 is connected to the outer ring end face of the first rotating member 400, and the other end of the mounting base 210 is connected to the outer ring end face of the second rotating member 600.

[0065] The mounting bracket 200 includes at least two mounting seats 210, each of which is spaced apart along the axial direction of the force transmission cylinder 300. The support member 700 includes a first support rod 710 and a second support rod 720. The two ends of the first support rod 710 are respectively connected to two adjacent mounting seats 210. One end of the second support rod 720 is connected to the first support rod 710, and the other end is connected to the base frame.

[0066] The first support rod 710 forms a rigid frame by laterally connecting two adjacent bearing seats, preventing the bearing seats from shifting due to transmission chain vibration or torque.

[0067] The second support rod 720 is fixed at one end to the first support rod 710 and connected to the base frame at the other end, transmitting the force of the transmission chain to the base frame, forming a triangular stable structure, and reducing the transmission of vibration to the tower or nacelle.

[0068] On the other hand, this application also provides a wind turbine generator set, including a body and a transmission chain structure as described in any of the above embodiments disposed on the body.

[0069] This application provides a wind turbine generator set for converting wind energy into electrical energy. The main body of the wind turbine generator set includes a tower and a nacelle. The nacelle is located on top of the tower, and the drive train structure is at least partially located inside the nacelle. The hub 100 of the drive train structure is located on top of the tower and connected to the nacelle. In the drive train structure of this application, by extending the rotating hub 100, the extended part is placed inside the nacelle and rotates at the same speed as the hub 100. The components of the hydraulic pitch control system are integrated inside the hub 100 and the drive cylinder 300, thereby eliminating the need for a liquid slip ring and providing sufficient maintenance space for structural layout.

[0070] Other embodiments of this application will readily occur to those skilled in the art upon consideration of the specification and practice of the utility model disclosed herein. This application is intended to cover any variations, uses, or adaptations of this application that follow the general principles of this application and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of this application are indicated by the following claims.

[0071] It should be understood that this application is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this application is limited only by the appended claims.

Claims

1. A chain drive structure, characterized by, include: A wheel hub, wherein the wheel hub has a first receiving cavity; Mounting bracket, which is used to connect to the underframe of the nacelle; A force transmission cylinder is rotatably disposed within the mounting support. The force transmission cylinder is used to connect to the hub and rotate synchronously with the hub. The force transmission cylinder has a second receiving cavity. The first receiving cavity and the second receiving cavity are connected. The second receiving cavity is used to install at least one of the accumulator, oil tank, pump group, pitch valve group and distribution valve group of the hydraulic pitch system. The first receiving cavity is used to install the hydraulic cylinder of the hydraulic pitch system.

2. The chain drive structure according to claim 1, characterized by It also includes a first rotating component, which is sleeved on the force transmission cylinder. One end of the force transmission cylinder is connected to the hub through the first rotating component, and the first rotating component is rotatably mounted on the mounting support.

3. The chain drive structure of claim 2, wherein, The first rotating component includes a first bearing and a second bearing. The inner rings of the first bearing and the second bearing are sequentially sleeved on the force transmission cylinder. The outer rings of the first bearing and the second bearing are fixedly connected to the mounting support. The inner rings of the first bearing and the second bearing rotate relative to the mounting support around the axis of the hub.

4. The chain drive structure according to claim 3, characterized in that, The balls of the first bearing are arranged longitudinally, and the balls of the second bearing are arranged laterally.

5. The chain drive structure of claim 1, wherein It also includes a first planetary gear train and a second rotating component. The first planetary gear train includes a planet carrier, a fixed shaft, planet gears, and a sun gear. The fixed shaft is disposed on the planet carrier, and the planet gears are rotatably disposed on the fixed shaft. The planet gears mesh with the sun gear. The second rotating component is connected to the end of the force transmission cylinder opposite to the hub, and the second rotating component meshes with the planetary gear. The second rotating component is rotatably mounted on the mounting support.

6. The chain drive structure of claim 5, wherein, The second rotating component includes a third bearing and a gear ring. The third bearing has an inner ring and an outer ring. The inner ring of the third bearing is connected to the gear ring, and the gear ring meshes with the planetary gear. The outer ring of the third bearing is fixedly connected to the mounting bracket, and the inner ring of the third bearing rotates relative to the mounting bracket about the axis of the hub.

7. The chain drive structure of claim 6, wherein The third bearing is a double-row cylindrical roller bearing, and the first planetary gear train is a double-linked planetary gear train.

8. A chain drive structure according to any one of claims 1-7, characterized in that It also includes a support member, one end of which is connected to the mounting bracket, and the other end is used to connect to the base frame.

9. The chain drive structure of claim 8, wherein, The mounting bracket includes at least one mounting base, and the support member includes a first support rod and a second support rod. The first support rod is connected to the mounting base, and one end of the second support rod is connected to the first support rod, while the other end is connected to the base frame.

10. A wind power unit, characterized in that It includes a body and a transmission chain structure as described in any one of claims 1-9 disposed on the body.

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